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48a1d526 UD |
1 | #include <dirent.h> |
2 | #include <fcntl.h> | |
3 | #include <stdio.h> | |
4 | #include <stdlib.h> | |
5 | #include <string.h> | |
6 | #include <unistd.h> | |
ceaa9889 | 7 | #include <sys/stat.h> |
48a1d526 UD |
8 | |
9 | ||
10 | static void prepare (void); | |
11 | #define PREPARE(argc, argv) prepare () | |
12 | ||
13 | static int do_test (void); | |
14 | #define TEST_FUNCTION do_test () | |
15 | ||
16 | #include "../test-skeleton.c" | |
17 | ||
18 | static int dir_fd; | |
19 | ||
20 | static void | |
21 | prepare (void) | |
22 | { | |
23 | size_t test_dir_len = strlen (test_dir); | |
24 | static const char dir_name[] = "/tst-symlinkat.XXXXXX"; | |
25 | ||
26 | size_t dirbuflen = test_dir_len + sizeof (dir_name); | |
27 | char *dirbuf = malloc (dirbuflen); | |
28 | if (dirbuf == NULL) | |
29 | { | |
30 | puts ("out of memory"); | |
31 | exit (1); | |
32 | } | |
33 | ||
34 | snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name); | |
35 | if (mkdtemp (dirbuf) == NULL) | |
36 | { | |
37 | puts ("cannot create temporary directory"); | |
38 | exit (1); | |
39 | } | |
40 | ||
41 | add_temp_file (dirbuf); | |
42 | ||
43 | dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY); | |
44 | if (dir_fd == -1) | |
45 | { | |
46 | puts ("cannot open directory"); | |
47 | exit (1); | |
48 | } | |
49 | } | |
50 | ||
51 | ||
52 | static int | |
53 | do_test (void) | |
54 | { | |
55 | /* fdopendir takes over the descriptor, make a copy. */ | |
56 | int dupfd = dup (dir_fd); | |
57 | if (dupfd == -1) | |
58 | { | |
59 | puts ("dup failed"); | |
60 | return 1; | |
61 | } | |
62 | if (lseek (dupfd, 0, SEEK_SET) != 0) | |
63 | { | |
64 | puts ("1st lseek failed"); | |
65 | return 1; | |
66 | } | |
67 | ||
68 | /* The directory should be empty safe the . and .. files. */ | |
69 | DIR *dir = fdopendir (dupfd); | |
70 | if (dir == NULL) | |
71 | { | |
72 | puts ("fdopendir failed"); | |
73 | return 1; | |
74 | } | |
75 | struct dirent64 *d; | |
76 | while ((d = readdir64 (dir)) != NULL) | |
77 | if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0) | |
78 | { | |
79 | printf ("temp directory contains file \"%s\"\n", d->d_name); | |
80 | return 1; | |
81 | } | |
82 | closedir (dir); | |
83 | ||
84 | static const char symlinkcontent[] = "some-file"; | |
85 | if (symlinkat (symlinkcontent, dir_fd, "another-file") != 0) | |
86 | { | |
87 | puts ("symlinkat failed"); | |
88 | return 1; | |
89 | } | |
90 | ||
91 | struct stat64 st2; | |
92 | if (fstatat64 (dir_fd, "another-file", &st2, AT_SYMLINK_NOFOLLOW) != 0) | |
93 | { | |
94 | puts ("fstatat64 failed"); | |
95 | return 1; | |
96 | } | |
97 | if (!S_ISLNK (st2.st_mode)) | |
98 | { | |
99 | puts ("2nd fstatat64 does not show file is a symlink"); | |
100 | return 1; | |
101 | } | |
102 | ||
103 | if (fstatat64 (dir_fd, symlinkcontent, &st2, AT_SYMLINK_NOFOLLOW) == 0) | |
104 | { | |
105 | puts ("2nd fstatat64 succeeded"); | |
106 | return 1; | |
107 | } | |
108 | ||
109 | char buf[100]; | |
110 | int n = readlinkat (dir_fd, "another-file", buf, sizeof (buf)); | |
111 | if (n == -1) | |
112 | { | |
113 | puts ("readlinkat failed"); | |
114 | return 1; | |
115 | } | |
116 | if (n != sizeof (symlinkcontent) - 1) | |
117 | { | |
118 | printf ("readlinkat returned %d, expected %zu\n", | |
119 | n, sizeof (symlinkcontent) - 1); | |
120 | return 1; | |
121 | } | |
122 | if (strncmp (buf, symlinkcontent, n) != 0) | |
123 | { | |
124 | puts ("readlinkat retrieved wrong link content"); | |
125 | return 1; | |
126 | } | |
127 | ||
128 | if (unlinkat (dir_fd, "another-file", 0) != 0) | |
129 | { | |
130 | puts ("unlinkat failed"); | |
131 | return 1; | |
132 | } | |
133 | ||
134 | close (dir_fd); | |
135 | ||
136 | return 0; | |
137 | } |